The recently repaired tunnel-boring machine Bertha stopped digging early Tuesday, after a barge tilted, damaged a dock and spilled excavated dirt into Elliott Bay. Divers and marine surveyors were ...

After nearly a month on the job, Seattle’s giant highway tunneling machine has advanced a mere 24 feet. Contractors blame the delays mostly on fiberglass strands that became stuck near the cutting ...

In a few days, a huge conveyor belt system will begin moving thousands of tons of dirt from the south end of the Carson City Bypass alongside U.S. 50 toward Spooner Summit. Will Hellickson of Road and ...

The shield is actually a sharp-edged cylinder that cuts through the earth, squeezing the earth in at the shield's face. Tunnel workers gather the muck and dirt as it pours in. They toss the dirt on ...

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